*{margin:0px;
  padding:0px;
  box-sizing:border-box;
  list-style: none;
  outline: none;
  text-decoration: none;
}

body{
  background:#f2f2f2;
}
.center {
  position:absolute;
  top:50%;
  left: 50%;
  transform:translate(-50%,-50%)
}

.center-y {
  position:absolute;
  top: 50%;
  transform:translate(0,-50%)
}